Mass extinctionUsually, extinction operates at a fairly constant rate, culling some species while speciation generates new ones. However, at a few points in life's history the humdrum of regular extinction has been interrupted by mass extinctions. Learn more about these biodiversity crises.

Learn about the tree of lifeThis tutorial on phylogenetics explains the basics of tree-thinking and provides many examples from real organisms.This resource is available from the Peabody Museum of Natural History

Lines of evidence: The science of evolutionThe theory of evolution is broadly accepted by scientists — and for good reason! Learn about the diverse and numerous lines of evidence that support the theory of evolution.

Mass extinctionUsually, extinction operates at a fairly constant rate, culling some species while speciation generates new ones. However, at a few points in life's history the humdrum of regular extinction has been interrupted by mass extinctions. Learn more about these biodiversity crises.

Natural selection: The basicsDarwin's most famous idea, natural selection, explains much of the diversity of life. Learn how it works, explore examples, and find out how to avoid misconceptions.This article is located within Evolution 101.

Nature of scienceUnderstanding how science works allows one to easily distinguish science from non-science. Thus, to understand biological evolution, or any other science, it is essential to begin with the nature of science.

Lines of evidence: The science of evolutionThe theory of evolution is broadly accepted by scientists — and for good reason! Learn about the diverse and numerous lines of evidence that support the theory of evolution.

Nature of scienceUnderstanding how science works allows one to easily distinguish science from non-science. Thus, to understand biological evolution, or any other science, it is essential to begin with the nature of science.